Binding of methylene blue to polyelectrolytes containing sulfonate groups

Ignacio Moreno-Villoslada, Cristian Torres, Felipe González, Toshimichi Shibue, Hiroyuki Nishide

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42 Citations (Scopus)

Abstract

The interaction between methylene blue (MB) and poly(sodium 4-styrenesulfonate) (PSS), poly(sodium vinylsulfonate) (PVS), and the more hydrophobic poly[sodium 2-(N-acrylamido)-2-methyl-propanesulfonate] (PAMPS), is investigated. The main driving forces for the interaction with PSS are supposed to be short-range aromatic/aromatic interactions, which explain the smaller dissociation constant, the resistance to the cleaving effect of NaCl, and the prevention of MB self-aggregation around the macromolecules under a moderate excess of the polymer. On the contrary, as a consequence of long-range interactions, a higher local concentration of MB around PAMPS and, more significantly, around PVS results in MB self-aggregation that can be quenched in the presence of NaCl.

Original languageEnglish
Pages (from-to)1167-1175
Number of pages9
JournalMacromolecular Chemistry and Physics
Volume210
Issue number13-14
DOIs
Publication statusPublished - 2009 Jul 21

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ASJC Scopus subject areas

  • Materials Chemistry
  • Polymers and Plastics
  • Organic Chemistry
  • Physical and Theoretical Chemistry
  • Condensed Matter Physics

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